01480nam a2200181 a 450000100080000000500110000800800410001910001030006024500240016326000250018730000110021249000380022350001070026152008840036865000170125265000090126965300200127818154422016-09-21       1951    bl uuuu      00u1 u    #d1 aESTADOS UNIDOS. Department of Agriculture. Agricultural Research Adminstration. Soil Survey Staff.  aSoil survey manual.  aWashington, DCc1951  a503 p.  a(USDA. Agriculture Handbook, 18).  aEdição revista e ampliada da U. S. Department of Agriculture Miscellaneous Publication, 274 de 1937.  aSoil and landscape; Character of soil maps and reports; Purpose of soil maps and reports; Preparation for field work; Plotting and assembly of field data; Examination and description of soils in the field; Parent material of soils; Land form, relief, and drainage; Identification and nomenclature of soil horizons; Soil color, texture, coarse fragments, stoniness, rockiness, structure; Soil consistence; Soil reaction; Special formations in soil profiles; Organic matter and roots; Accelerated soil erosion; Vegetation; Land use; Units of soil classification and mapping legend; Plotting soil boundaries in the field; Collection and examination of soil samples; Estimation and mapping of salts and alkali in the soil; Yield predictions and soil management practices; Soil correlation and inspection; Soil grouping on the map; The soil survey report; Reconnaissance soil mapping.  aLevantamento  aSolo  aClassificação